Should my agent depend on the MCP server io.github.nansen-ai/nansen-mcp?

Verdict: allow — rich-solo — safe to depend on As of 2026-08-15T11:28:18Z: a dated observation with receipts, not a warranty.

Nansen

io.github.nansen-ai/nansen-mcp

Blockchain analytics API for AI agents. Smart Money signals, wallet profiling, token analytics.

— the operator's own registry description reported

Publisher io.github.nansen-ai · first seen 2026-08-12 · endpoint https://mcp.nansen.ai/ra/mcp/

allow

verdict

rich-solo

cluster

ok_tools

answers

tools served

Dependency rating derived

allow — rich-solo — safe to depend on

Cluster rich-solo · distinctiveness 0.645 (unusual). Every figure is a percentile or class within the 11,094-server census — see the whole spectrum.

Reach — can an agent get to it?

answersalive_tools

latency156 ms

vs populationtypical

protocolcurrent

authopen

Use — can it use it?

tools38

vs populationhigh

capabilities6

harnessB

Trust — can it rely on it?

identitysolo

servers on its host1

verifiabilityunassessed

duplicate inventoryno

drift events0

answers trueno primary

🔏 Signed receipt rr_04854381ed10bf8b210b3842 · ed25519 · key rs-rcpt-2026-08 — this rating is tamper-evident; an agent gets the full signature from check_server and can verify it against the published key.

Tools last seen

address_counterparties address_dex_trades address_historical_balances address_portfolio address_related_addresses address_transactions general_search growth_chain_rank hyperliquid_leaderboard nansen_score_top_tokens prediction_market_address_pnl prediction_market_address_summary prediction_market_address_trades prediction_market_lookup prediction_market_ohlcv prediction_market_orderbook prediction_market_pnl_leaderboard prediction_market_position_detail prediction_market_screener prediction_market_top_holders prediction_market_trades smart_traders_and_funds_perp_trades smart_traders_and_funds_token_balances token_current_top_holders token_dex_trades token_discovery_screener token_flows token_info token_ohlcv token_pnl_leaderboard token_quant_scores token_recent_flows_summary token_technical_indicators token_transfers token_who_bought_sold transaction_lookup wallet_pnl_for_token wallet_pnl_summary

Harness readiness observed

Can an agent's harness pick this tool and call it correctly? Graded on the three things an agent reads — name, description, typed parameters. Band B — usable, with rough edges.

legibility check	tools passing	ok
name is clear & specific	38/38	✓
has a description	38/38	✓
description is substantive	38/38	✓
parameters are typed	38/38	✓
parameters are described	7/38	7/38

38 of 38 tools graded · 38 with a captured input schema. RS-008, Tier-1 — no domain knowledge, applies to any tool. “Alive” is not the same as “usable”.

Truth checks observed

Not in the Tier-2 trade lane, or not yet checked. Tier-2 re-derives a server's answers against published primary sources — see truth checks.

Protocol conformance observed

2025-06-18

protocol version

—

session model

3.2.4

server version nansen-mcp

Capabilities: experimental extensions logging prompts resources tools

Drift

No confirmed drift on record. Baseline set 2026-08-14; changes appear here after human review.

History observed

Every probe we made, oldest → newest (2 shown, 2026-08-12 → 2026-08-14). Green answered · amber answered-but-walled · red no useful answer. A gap in our cadence is a gap in coverage, not evidence about the server.

changelog (1 events)

date	type	what changed
2026-08-12	outcome	first probe: ok_tools

raw probe records

probed (UTC)	outcome	http	ms	protocol
2026-08-14T19:59:52Z	ok_tools	200	156	2025-06-18
2026-08-12T05:35:09Z	ok_tools	200	53	2025-06-18

Watch or embed this verdict

Operators: put the live verdict in your README — it updates with every census, links back here, and is a dated observation, never a warranty:

[![Robin Saige verdict](https://robinsaige.com/badge/io.github.nansen-ai/nansen-mcp.svg)](https://robinsaige.com/s/io.github.nansen-ai/nansen-mcp)

Depend on it? Subscribe to its change feed — outcome changes and confirmed drift, no account needed. Building on it? The full dossier as JSON — verdict, rating, truth checks, history — stable enough to gate CI on.

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